/*
 * Copyright 2023-2024 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.ai.evaluation;

import java.util.List;
import java.util.stream.Collectors;

import org.springframework.ai.document.Document;
import org.springframework.util.StringUtils;

@FunctionalInterface
public interface Evaluator {

	EvaluationResponse evaluate(EvaluationRequest evaluationRequest);

	default String doGetSupportingData(EvaluationRequest evaluationRequest) {
		List<Document> data = evaluationRequest.getDataList();
		return data.stream()
			.map(Document::getText)
			.filter(StringUtils::hasText)
			.collect(Collectors.joining(System.lineSeparator()));
	}

}
